| /* |
| * bcmrand.h. |
| * |
| * Copyright (C) 2020, Broadcom. |
| * |
| * Unless you and Broadcom execute a separate written software license |
| * agreement governing use of this software, this software is licensed to you |
| * under the terms of the GNU General Public License version 2 (the "GPL"), |
| * available at http://www.broadcom.com/licenses/GPLv2.php, with the |
| * following added to such license: |
| * |
| * As a special exception, the copyright holders of this software give you |
| * permission to link this software with independent modules, and to copy and |
| * distribute the resulting executable under terms of your choice, provided that |
| * you also meet, for each linked independent module, the terms and conditions of |
| * the license of that module. An independent module is a module which is not |
| * derived from this software. The special exception does not apply to any |
| * modifications of the software. |
| * |
| * |
| * <<Broadcom-WL-IPTag/Dual:>> |
| */ |
| |
| #ifndef _bcmrand_h_ |
| #define _bcmrand_h_ |
| |
| /* When HOST driver is for PCIE dongle image, we suppose the HOST must provide the entropy |
| * input if it does not define the macro BCM_RNG_NO_HOST_ENTROPY |
| */ |
| |
| /* the format of current TCM layout during boot |
| * |
| * Code Unused memory Random numbers Random number Magic number NVRAM NVRAM |
| * byte Count 0xFEEDC0DE Size |
| * |<-----Variable---->|<---Variable--->|<-----4 bytes-->|<---4 bytes---->|<---V--->|<--4B--->| |
| * |<------------- BCM_ENTROPY_HOST_MAXSIZE --------->| |
| */ |
| |
| /* The HOST need to provided 64 bytes (512 bits) entropy for the bcm SW RNG */ |
| #define BCM_ENTROPY_MAGIC_SIZE 4u |
| #define BCM_ENTROPY_COUNT_SIZE 4u |
| #define BCM_ENTROPY_SEED_NBYTES 64u |
| #define BCM_ENTROPY_NONCE_NBYTES 16u |
| #define BCM_ENTROPY_HOST_NBYTES 128u |
| |
| #ifdef DBG_RNG_SEC_TEST |
| #define BCM_ENTROPY_MAX_NBYTES 128u |
| #else |
| #define BCM_ENTROPY_MAX_NBYTES 512u |
| #endif /* DBG_RNG_SEC_TEST */ |
| #define BCM_ENTROPY_HOST_MAXSIZE \ |
| (BCM_ENTROPY_MAGIC_SIZE + BCM_ENTROPY_COUNT_SIZE + BCM_ENTROPY_MAX_NBYTES) |
| |
| /* Constant for calculate the location of host entropy input */ |
| #define BCM_NVRAM_OFFSET_TCM 4u |
| #define BCM_NVRAM_IMG_COMPRS_FACTOR 4u |
| #define BCM_NVRAM_RNG_SIGNATURE 0xFEEDC0DEu |
| |
| #endif /* _bcmrand_h_ */ |
